Thermal modification is a process that utilizes high heat, pressure, and steam to alter the dimensional composition of wood. The cellular structure is changed by applying heat without oxygen, which creates a controlled chemical reaction. The thermal modification process permanently modifies the cell walls of the wood and results in improved durability of the wood as well as increased dimensional stability.
Pine undergoes significant improvement in terms of stability and durability through thermal modification. While it may not be as naturally durable as ash, the thermal treatment reduces its moisture content and improves its resistance to warping, splitting, and fungal decay. Thermally modified southern yellow pine is also used in siding, decking, fencing, and interior features.
Naturally light and uniform in color, this thermally modified Hemlock will accept any stain, which makes it totally customizable for both interior or exterior use. And because the thermal modification process reduces cupping and warping, this product is a dream to install and lays straight and flat.
Radiata Pine is knot free with a beautiful golden-brown tone. Each and every board is unique, with its own natural grain. In addition to adding to the wood’s aesthetic appeal, thermal modification improves its dimensional stability and increases its durability, which is important when using the wood outdoors.
Ash wood is naturally dense and durable, and the thermal modification process further strengthens its resistance to decay, rot, and insect attacks. Thermally modified ash exhibits excellent stability, making it a suitable choice for exterior applications like decking, cladding, and outdoor furniture.
Thermal modification gives wood a naturally beautiful brown tone.
As with any wood, the surface of thermally modified wood will fade to a natural silver-gray color over time. This process starts immediately after the products are installed and can take a few months to several years depending on how much UV light they are exposed to. The durability of the boards is not affected.
It must be taken into account that wood is a natural material and the change of color over time may be uneven. Each board ages in its own way. And the different sides of the house facade age differently, depending on the sun and rain falling on the board.
To reduce discoloration or restore the original color of thermal wood, modified boards can be protected by covering them with a UV-resistant pigmented finish (wax, stain, paint, mineral oil, etc.).
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